Proverbs 27:1

King James Version (public domain)

Traditionally attributed to Solomon · c. 10th century BC · King of Israel, renowned for wisdom

Boast not thyself of to morrow; for thou knowest not what a day may bring forth.

Context

1Boast not thyself of to morrow; for thou knowest not what a day may bring forth.

2Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips.

3A stone is heavy, and the sand weighty; but a fool’s wrath is heavier than them both.